42511566 has 8 divisors (see below), whose sum is σ = 85023144. Its totient is φ = 14170520.

The previous prime is 42511537. The next prime is 42511589. The reversal of 42511566 is 66511524.

It is a sphenic number, since it is the product of 3 distinct primes.

42511566 is an admirable number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3542625 + ... + 3542636.

It is an arithmetic number, because the mean of its divisors is an integer number (10627893).

Almost surely, 2^42511566 is an apocalyptic number.

42511566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42511566 is a wasteful number, since it uses less digits than its factorization.

42511566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7085266.

The product of its digits is 7200, while the sum is 30.

The square root of 42511566 is about 6520.0894165648. The cubic root of 42511566 is about 349.0082564419.

The spelling of 42511566 in words is "forty-two million, five hundred eleven thousand, five hundred sixty-six".